Internal combustion motor



J. M. MORGAN INTERNAL COMBUSTION MOTOR Filed Feb. 19, 1940 fall/All! 1 N VENTOR. lnL 7 41, 4?

flTfO/FA/EV ugly May 18, 1943.

Patented May 18, 1943 UNITED STATES PATENT OFFICE INTERNAL COMBUSTION MOTOR John M. Morgan, Houston, Tex.

Application February 19, 1940, Serial No. 319,634

1 Claim.

- This invention relates to an internal combustion motor.

An object of the invention is to provide an internal combustion motor, preferably of the two cycle type wherein the explosive charges are compressed in auxiliary compression chambers, outside of the crankcase and delivered under compression into the explosion chambers of the motor.

A further object of the invention is to provide in a motor of the character described a novel type of piston and piston rod assembly.

With the above and other objects in view the invention has particular relation to certain novel features of construction, operation and arrangement of parts, an example of which is given in this specification and illustrated in the accompanying drawing, wherein:

The figure shows a side elevation of the motor shown partly in section.

Referring now more particularly to the drawing, the numeral designates the motor case to opposite ends of which are bolted the cylinders 2, 2. These cylinders are preferably in axial alignment and have the Water jackets 3 around them providing the water circulating chambers as 4.

Secured to opposite ends of the casing l are the stationary pistons 5, 5. The inner ends of these pistons have the external flange 6, 6 which are clamped between the inner ends of the cylinders 2 and the adjacent ends of the casing l as shown in Figure 1. The hollow piston rods 1, 1 work through axial bearings in the stationary pistons and are surrounded by the stuiiing boxes 8, 8 which are mounted in the piston 5. The inner ends of the piston rods 1 may be connected, by any selected mechanism'in the casing I, to a crank shaft or other driven element.

Screwed into the outer end of each piston rod 1 there is a tubular valve stem guide 31 whose outer end is enlarged and formed hollow formin a cage 38 which has a plurality of outlet perforations 39. The outer end of the cage terminates in an external, annular flange 40 and is provided with an inside, tapering seat 4| with which the back pressure valve 42 cooperates. This valve is attached to a stem 43 which extends inwardly through said guide and has a stop 44 on the inner end thereof and a coil spring 45 surround the inner end of said stem and is interposed between said stop and the inner end of the guide 31 and normally holds the valve 42 closed.

A perforated disc 46 is fitted against the outer end of the corresponding rod 1 and through which the guide 31 extends.

There is a hollow piston 41 fitted closely in the cylinder 2 whose outer end is inwardly turned and rests against the inner side of the flange 40. This piston is provided with an internal, annular shoulder 48 which rests against the margin of the disc 46. When the piston parts, above described, are assembled and the guide 31 screwed home the flange 40 will be clamped against the outer end of the piston 41 and simultaneously the disc 46 will be clamped between the shoulder 43 and the outer end of the corresponding piston rod 41.

The piston 41 has conventional, annular, external seal rings around it forming seals between the piston and the walls of the cylinder. The inner end of the piston 41 is open so a to telescope loosely over the corresponding fixed piston 5. An auxiliary compression chamber 49 is thereby formed.

Each auxiliary compression chamber i provided with an intake pipe 50 leading from a suitable carburetor and leading from the inner end of the intake pipe through the wall of the cylinder 2 are the inlet ports 5|. The inner end of each intake pipe 50 is formed with a valve seat 52 which is controlled by the inwardly opening back pressurevalve 53. This valve has a stem 54 which is mounted for axial movement in the spider 55. The outer end of the stem has the stop 56 thereon and surrounding said stem and interposed between the spider 55 and the stop 54 there is a coil spring 51 which normally holds the corresponding valve 53 closed.

Upon outward movement of the piston 41 the charge in the explosion chamber 58 will be compressed ready to be fired upon the creation of a spark by the plug 59. At the same time a fresh charge will be drawn into the auxiliary compression chamber 49 through the corresponding intake pipe 50. Upon back stroke of said piston the valve 53 will be closed and the charge taken into the auxiliary compression chamber 49 will be compressed. When the piston 42 clears the inner end of the exhaust pipe to the spent gases from the explosion chamber will begin to exhaust and the compressed gas in the auxiliary chamber 49 will be forced under compression through the perforated plate 46 and inwardly through the ports 39 and will lift the valve 42 and enter the explosion chamber 58. The entering compressed gas will be deflected, by the deflector 6|, around behind the spent gases and will force all of the spent gases out of the combustion chamber 58 before the exhaust pipefill is closed upon the next forward movement of the piston 41. Upon completion of the forward stroke of the piston 41 another charge will be compressed ready to be fired.

The perforated plate 46 is reinforced by a number of cross-webs 62 formed in the outer end of the piston and whose inner ends rest against said plate.

The drawing and description are illustrative merely, while the broad principle of the invention 10 will be defined by the appended claim.

What I claim is: 

